Question

The Mathematics test marks of 90 students of class ix are as follows.
Marks
10-20 20-30 (30-40 40-50 50 60 60 70 70 100
'Number of students 7 10 10 20 20 15
(1) Find the probability of student who obtained less than 20 % in the test.
Find the probability of student who obtained 60%or above in the test​

Answer 1

Answer:

1)17/92

Step-by-step explanation:

it is because the students below 20% =20 marks and the number of students are 92

2)35/92 because above 60%marks are scored by 35 students